PURPOSE: To improve operability by arranging a slave set on the right side as one face a master set to use it with a right hand, which is appropriate fore the most of users, arranging a display part on the left/low side as one face to be in a position which is easy to see and providing a level defference for the dial part and the grasping part.

CONSTITUTION: The slave set 2 is arranged on the right side as one face the master set 1. Then, a cassette part, a speaker part 4 and the display part 7 is provided. As the most of users are right-handed, the slave set 2 is arranged on the right side so as to appropriately use it with one's right hand. Next, the display part 7 utilizes a liquid crystal, etc., displaying a telehone numer, a calling time and a various kinds of register numbers and is provided in the left/low position as one face to make it easy to see. Furthermore, the slave set is provided with the level difference 2a at the border of the dial part and the grasping part 6 so as to prevent the dial from being touched by a hand grasping the slave set and to sufficiently grasp the slave set so that the user gets less tired even at the time of a long call.